Black Box 25-Pack RJ45 Dust Cover (Blue)

The Black Box FMT100 is a set of RJ45 dust covers that helps you guard open network ports against dust, lint, and accidental contact. Each cover presses into an unused RJ45 jack in a patch panel or wall plate, forming a simple barrier that keeps the metal contacts clean and shielded.

In server rooms, data centers, classrooms, or office wiring closets, open ports can sit idle for weeks or months. Dust and humidity build up over time and may weaken signal quality or cause corrosion. By closing those ports with the FMT100 covers, you lower the chance of future connection issues and reduce troubleshooting time.

The covers arrive in blue, making it easy to reserve specific jacks for upcoming projects, identify spare capacity at a glance, or group ports by department. Technicians can step up to a rack and see immediately which connections are available or off limits, improving workflow and minimizing errors during moves, adds, and changes.

Every bag contains twenty-five covers, enough to outfit a full patch panel or keep a field kit stocked for multiple jobs. Installation takes seconds, removal is just as quick, and the covers store neatly until needed again. For network administrators who want a tidy rack, reliable performance, and clear visual organization, this small accessory delivers noticeable peace of mind at a modest cost.

Highlights:

• Pack of twenty-five RJ45 dust covers
• Blue color helps identify reserved or spare ports
• Shields unused jacks from dust and environmental buildup
• Snaps easily into patch panels or wall plates and removes just as quickly
• Supports cleaner cabling and more reliable network performance